diff --git a/org/mozilla/jss/pkcs11/PK11Store.c b/org/mozilla/jss/pkcs11/PK11Store.c
index 96883be9..34077880 100644
--- a/org/mozilla/jss/pkcs11/PK11Store.c
+++ b/org/mozilla/jss/pkcs11/PK11Store.c
@@ -838,7 +838,7 @@ Java_org_mozilla_jss_pkcs11_PK11Store_importEncryptedPrivateKeyInfo(
         goto finish;
     }
     SECItem nickItem;
-    nickItem.data = nicknameChars;
+    nickItem.data = (unsigned char *) nicknameChars;
     nickItem.len = (*env)->GetStringUTFLength(env, nickname);
 
     // if keyUsage = 0, defaults to signing and encryption/key agreement.
diff --git a/org/mozilla/jss/provider/java/security/JSSKeyStoreSpi.c b/org/mozilla/jss/provider/java/security/JSSKeyStoreSpi.c
index 68b81e3f..de1b6e8a 100644
--- a/org/mozilla/jss/provider/java/security/JSSKeyStoreSpi.c
+++ b/org/mozilla/jss/provider/java/security/JSSKeyStoreSpi.c
@@ -617,7 +617,7 @@ findKeyCallback
 {
     JSSTraversalStatus status = INIT_TRAVSTAT;
     FindKeyCBInfo *cbinfo = (FindKeyCBInfo*)data;
-    const char *objNick = getObjectNick(obj, type);
+    char *objNick = getObjectNick(obj, type);
 
     status.status = PR_SUCCESS;